Crushing mill



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Filed July 22.

LSE 7,538 A. c. DAMAN CRUSHING MILL 1922 2 Sheena-81mm. l

INVENTOR @rw/A1 TQQ/W4# De@ 2, i924?. 1,517,538

A. c. DAMAN CRUSHING MILL Filed July 22. 1922 2 Www-@heet 2 Application led July at,

To all whom z't may comer/n."

Be it known that I, ARTHUR C. Dina/IAN, a citizen of the United States of America, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Crushing Mills, of which the following is a specification.

This invention relates to crushin mills of the type adapted to use metal ba ls, tubes or pebbles as a crushing medium,and has f or its principal object the provision of a mill of this type which will be especially applicable for use in a laboratory where it is desired to experimentally subject ores to a great variety of treatments. With the use of this invention the ore can besubjected to a great variety of varying conditions with the one machine as will be later described, in order to determine the proper equipment necessary for its eficient treatment.

A further object of the invention is to provide a mill that can be completely and thoroughly emptied and cleaned as it is important in experimental work that the mill be known to be absolutely clean before the experiment is started and also that all of the material has been removed from the machine after the experiment in order to accurately check the work done. i

Other objects and advanta es reside in the detailed construction of' tr e invention, which result in sim licity, economy and eiliciency, and which will become more `apparent from the following descri tion.

In the following detailed` description 'of the invention reference is had to the accompanying drawings which form a part hereof. Like numerals refer to like arts 1n all views of the drawings and throug out the description.

In the drawings Fig. 1 is a side elevation of the device.

partly in section, set up to act as a long ballY with flanges, 19, and secured together by mill with gratos.

Fig. 2 is an end elevationof the same, looking toward the discharge end of the mill.

Fig. 3 is a detail section of a form of discharge head which is applied to the mill when it is desired to parallel the conditions of a conical, overflow type of ball mill.

Fig. 4 is a detail view of a radially slotted grate which may be applied to the mill.

Fig. 5 is a cross section through the same, taken on the line 5-5, Fig. 4. l

1922. Serial No. 576,807.

Fig. 6 is a vertical section taken on the line 6 6, Fig. 1. j

Let the numeral 10 designate a foundation upon which the mill rests. Bolted to foundation 10 are two bearings 11 adapted to carry a horizontal shaft 12.

A structural steel fra-me 14, is rotatably supported near its one extremity upon the shaft 12, by means of bearings 13, and near its opposite extremity by means of adjusting screws, 15, engaging the foundation 10. By means of the adjusting screws the operating angle of the mill may be varied for experimental purposes. s

Slidably mountedv on the frame 14 are two bearing supports 16 and 17 in the upper extremities of which the trunnions of the mill arecarried. The bearing supports 16 and 17 can be clamped in any desired position on the frame 14 by means of clamping nuts 18.

llhe frame 14 comprises two longitudinal channel-iron members 35, the lateral flanges of which, 36, are directed inward as illustrated. The lower flanges of the longitudinal members are riveted at their one extremity to a plate 37, to which is also secured the bearings 13 and at their other extremity to a plate 38, into which the adjusting screws 15 are threaded. A clamping member 39 is carried by clamp bolts in each of the bearing supports 16 'and 17 and is arranged to be clamped against the vunder side of the upper flanges of the longitudinal members when the clamping nuts 18 are tightened. The bearing supports 16 and 17 may be provided, at their bottoms, with flanges or lugs 41 for engaging the longitudinal members 35 for holding the bearing supports in alignment. This may be accomplished, however, by having the bolts 40 placed sufficiently close to the upper flanges of the longitudinal members toact as guides.

The mill proper consists of a series of interchangeable cylindrical units provided means of hinged studs 20; the joints between the .units being provided with suitable gaskets 21 to make the joints water tight.

The unit at the feed end of the mill will be called the feed unit and designated by the numeral 22. The exterior of feed unit 22 is crowned or arched outward as shown at 23,

in mills of this character. Feed unit 22 is also provided with a trunnion 24, through which material is fed into the mill, and any of the usual types of feed hoppers 25.

The unit at the opposite or discharge end of the mill will be called the discharge unit and designated by the numeral. 26. Discharge unit 26 is also. provided with a trunnion 27 through which the crushed product discharges. A grate 28 is adapted to be contained in the discharge unit 26 and held 1n spaced relation thereto by radial flanges 29. Flanges 29 act as lifters to raise the product passed by the screens to the discharge trunnion 27 Grate 28 is secured in the discharge unit 26 by means of a single bolt 30, which passes through the trunnion 27 to a yoke 31 on the exterior thereof. It will be noted that the grate 28 can be readily removedand the mill operated as a simple overflow discharge mill if desired. This simple adjustment is one of the features of the invention.

Separating the feed unit 22 from the discharge unit 26 are spacer units 31. Any number of spacer units 31 may be added to the mill and the bearing supports 16 and 17 adjusted on the frame 14 or if desired all of the spacer units 31 may be removed and the feed unit 22 coupled direct to the discharge unit 26. This allows great latitude in adjusting the length of the mill and is one of the features of the invention.

Should it be desired to operate/the mill as a simple overflow discharge, conical mill an alternate form of discharge unit 32 is secured to the discharge end of the mill in place of the discharge unit 26. It may be directly connected to the feed unit 22 or separated by the spacer units 31 as desired.

Should it be desired to experiment with radial screen slots a grate 33 is substituted for the grate 28.

In cleaning out the mill the feed end is raised, the mill revolving about shaft 12, until it is vertical; water can then be admitted through the feed trunnion and through an opening 34, provided in feed unit 22` and the remaining material washed out of the discharge trunnion 27.

The mill as shown admits of the following adjustments: A simple, cylindrical, overiiow type of mill ofvarious lengths; a conical, overflow type of mill of various lengths; a perforated grate mill of various lengths and a slotted grate mill of various lengths. All of these couldbe slanted to any desired degree.

A Variety of other adjustments could be added to the mill such as units with litters, feed'screws, etc. if desired as the flexibility of the construction admits of great latitude in the adding or removing units.

It is the combination of the rotatably supported frame with the slidably mounted bearing supports that gives the present invention its great flexibility of adjustment in the laboratory for the results to be obtained from various lengths of drums at various pitches can be quickly determined. For instance, experiments can be conducted on various ores to determine whether a long drum at a relatively steep angle would be more efiicient than a short horizontally placed drum.

While I have described and illustrated herein a specific form of my improvement I wish it understood that the same may be varied, within the scope of the appended claim, without departing from the spirit of the invention.

Having thus described the invention, what is claimed and desired secured by Letters Patent is z- The combination with a crushing mill cornprising a rotatably-mounted, substantially horizontally disposed, cylindrical drum supported at its extremities on trunnions and consisting of interchangeable cylindrical units; of a frame comprising longitudinal and transverse members, said frame being pivoted for vertical angle adjustment; bearing supports for said trunnions mounted on said longitudinal members, said bearing supports being longitudinally adjustable on said longitudinal members and clamping means carried by said bearing supports for securing said bearing supports at any desired longitudinal position on said longitudinal members.

In testimony whereof I affix my signature.

ARTHUR C. lDAMAN. 

